Tutorial: Getting Started with Protege-Frames
Protege Web site | Protege Wiki | About the Protege Team

Creating subclasses of Author
Now we want to add two more sources of articles (News_Service and Editor), which we will create as subclasses of Author.
  1. Select Author in the Class Hierarchy pane.

  2. Click the Create Class button and rename the new class News_Service. Whenever you create a new class, it is created as a subclass of the currently highlighted class. Also notice that when you create the first subclass of a class, a or icon appears to its left. You can use this icon to display or hide the subclasses of a class. So that we can develop the ontology in later sections, we will create another subclass of Author.

  3. Select Author in the Class Browser.

  4. Click the Create Class button and rename the new class Editor.